Biology: Life on Earth
10th Edition
ISBN: 9780321729712
Author: Gerald Audesirk, Teresa Audesirk, Bruce E. Byers
Publisher: Benjamin Cummings
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Textbook Question
Chapter 28, Problem 6FTB
During the nitrogen cycle, nitrogen gas is captured from its atmospheric reservoir by _____ in the soil, and is then returned to this reservoir by ________. The two forms of nitrogen that are used by plants are _____ and ________.
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Students have asked these similar questions
Which of the following best describes how using fertilizer would affect the nitrogen cycle?
The use of fertilizer would result in more nitrogen in the groundwater.
The use of fertilizer would result in less nitrogen in the soil.
The use of fertilizer would result in more phosphorus in the soil.
The use of fertilizer would result in more nitrogen being added to the carbon cycle.
From the nitrogen cycle diagram below, which of the following is/are a process by which nitrogen can move into the dissolved ocean nitrogen pool? (Select all that apply)
A- Denitrification
B- Runoff
C- Fossil fuel burning
D- Agricultural N fixation
E- Natural N fixation
Human activities alter the transfer rates of the nitrogen cycle, __________ the fixation rate.
Chapter 28 Solutions
Biology: Life on Earth
Ch. 28 -
1. Nearly all life gets its energy from _______...Ch. 28 -
2. Photosynthetic organisms are called either...Ch. 28 -
3. Feeding levels within ecosystems are also...Ch. 28 - In general, only about ______ percent of the...Ch. 28 - Prob. 5FTBCh. 28 -
6. During the nitrogen cycle, nitrogen gas is...Ch. 28 - Prob. 7FTBCh. 28 - Prob. 1RQCh. 28 -
2. What is a producer? What trophic level does it...Ch. 28 - 3. Define net primary production. Would you...
Ch. 28 - Name the first three trophic levels. Among the...Ch. 28 - How do food chains and food webs differ? Which is...Ch. 28 - Define detritivore and decomposer and explain...Ch. 28 -
7. Trace the movement of carbon from one of its...Ch. 28 - Prob. 8RQCh. 28 - Trace a pathway of a phosphorus molecule from a...Ch. 28 - Trace the movement of a water molecule from the...Ch. 28 -
1. Humans are omnivores who can feed on several...Ch. 28 - Define and give an example of biological...Ch. 28 - Discuss the contribution of human population...Ch. 28 - Describe what would happen to a population of deer...
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- Figure 20.12 Which of the following statements about the nitrogen cycle is false? a. Ammonification converts organic nitrogenous matter from living organisms into ammonium (NH4+) . b. Denitrification by bacteria converts nitrates (NO3) to nitrogen gas (N2) . c. Nitrification by bacteria converts nitrates (NO3) to nitrites (NO2) . d. Nitrogen fixing bacteria convert nitrogen gas (N2) into organic compounds.arrow_forwardFigure 46.17 Which of the following statements about the nitrogen cycle is false? Ammonification converts organic nitrogenous matter from living organisms into ammonium (NH4+). Denitrification by bacteria converts nitrates (NO3-) to nitrogen gas (N2). Nitrification by bacteria converts nitrates (NO3 ) to nitrites (NO2-). Nitrogen fixing bacteria convert nitrogen gas (N2) into organic compounds.arrow_forwardLocal conditions, such as heavy rainfall or the removal of plants, may limit the amount of nitrogen, phosphorus, or calcium available to a particular terrestrial ecosystem, but the amount of carbon available to the ecosystem is seldom a problem. Why?arrow_forward
- Which statement offers the best explanation of how deforesting hubbard brooks watershed (W2) affected the nitrogen cycle? 1. Denitrification rates increased, resulting in a decrease in the export of ammonium 2. Microbial immobilization rates increased, resulting in a decline in stream nitrogen 3. Mineralization rates increased, causing the export of ammonium to increase 4. plant uptake nitrogen stopped, resulting in an increase in the export of nitratearrow_forwardPlant growth is limited by available nitrogen. Why is nitrogen fixation a limiting factor? There is very little nitrogen available after fossil fuel combustion utilizes the available nitrogen. Nitrogen must be produced by bacteria due to the inability of recycling by decomposers. There is no nitrogen in the atmosphere; it is only found in aquatic biomes. The stability of nitrogen gas makes it difficult to turn into nitrogen for living things.arrow_forwardWhich of the following statements about the nitrogen cycle is false? a. Ammonification converts organic nitrogenous matter from living organisms into ammonium (NH4 +). b. Denitrification by bacteria converts nitrates (NO3 −) to nitrogen gas (N2). c. Nitrification by bacteria converts nitrates (NO3 −) to nitrites (NO2 −). d. Nitrogen fixing bacteria convert nitrogen gas (N2) into organic compounds.arrow_forward
- Give the importance of the a) water cycle b) nitrogen cyclearrow_forwardThe practice of crop rotation uses nitrogen fixation to create fertile fields. First, a plant without a nitrogen-fixing relationship, such as corn, is planted. After the harvest, a nitrogen-fixing plant replaces the initial crop. Instead of harvesting the nitrogen-fixing plant, however, it is plowed under. The cycle continues in this manner. Which of the following is not an abiotic factor that affects plants being used in crop rotation? a) NH3 availability b) Soil temperature c) Herbivore density d) Oxygen concentrationarrow_forwardWhich nutrient moves into plants during primary production? a.phosphorus b. nitrogen c. carbon d. none e. all threearrow_forward
- Why are nutrient cycles in nature called biogeochemical cycles?arrow_forwardWhy is the weathering of bedrock in a New Hampshire forest responsible for such a small fraction of the nutrients available to plants?arrow_forwardWhat incentives cause humans to capture nitrogen from the air and pump it into the nitrogen cycle? What are some consequences of human augmentation of the nitrogen cycle?arrow_forward
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